t() :: %Bella.Watcher.State{
  buffer: Bella.Watcher.ResponseBuffer.t(),
  client: module(),
  connection: K8s.Conn.t() | nil,
  extra: map(),
  initial_delay: integer(),
  k8s_watcher_ref: reference() | nil,
  resource_version: String.t() | nil,
  watch_timeout: term(),
  watcher: Bella.Watcher
}